1937 Loudoun County Aerial Photograph | |
Data format: SDE Raster Dataset File or table name: GISRSTR.GRSTR.B_W_1937 Coordinate system: Lambert Conformal Conic Theme keywords: Digital Orthophotography, imageryBaseMapsEarthCover |
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Abstract:
This data set contains the 1937 aerial imagery for the majority of Loudoun County, VA. It is composed of United States Farm Service Agency (USDA FSA) hardcopy imagery, which were scanned, georeferenced, and mosaicked by Loudoun County OMAGI to produce digital representations. Individual images cover approximately 15000' by 15000'. |
Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.
This data set contains the 1937 aerial imagery for the majority of Loudoun County, VA. It is composed of United States Farm Service Agency (USDA FSA) hardcopy imagery, which were scanned, georeferenced, and mosaicked by Loudoun County OMAGI to produce digital representations. Individual images cover approximately 15000' by 15000'.
This aerial imagery project was coordinated by the Loudoun County OMAGI. The backdrop image was developed as a historical reference, and has potential for land use/land cover change research, environmental resource investigations, and other temporal change analysis.
Data are stored in the corporate ArcSDE Geodatabase as a raster feature class. SDE geotabase imagery is available in the County's GIS, whereas copies of source files are provided for public distribution. The coordinate system is Virginia State Plane (North), Zone 4501, datum NAD83 HARN.
ground condition
To properly view the aerial image the following protocal must be followed. Load raster file to mxd > right click on layer > navigate to properties > select symbology tab > select background. This will remove the black background that initially appears upon loading the image.
1 Harrison Street, S.E., 2nd Floor
MS 65
The aerial phtotographs provided to the Office of Mapping and Geographic Information were scanned at 1200dpi and saved individually as tiff files. The scanned aerial photographs were then georeferenced. The georeferenced aerial photographs were then processed to create a seamless mosaic.
Internal feature number.
ESRI
1 Harrison Street SE, 2nd Floor, mailstop 65
Every reasonable effort has been made to assure the accuracy of these data. Loudoun County, Virginia does not assume any liability arising from the use of these data. These data are provided without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular service. Reliance on these data is at the risk of the user.
Size limit: 4.5 GB. Visit our website at: http://www.loudoun.gov/omagi, click on "Loudoun County Mapping Documents & Order Forms." The "Forms" directory will lead you to custom & standard (countywide) data order forms. Hardcopy maps may also be available; please contact the Mapping Office Public Information Counter for more information regarding all data requests.
1 Harrison Street SE, 2nd Floor, mailstop 65